Connecting my Powerbook to my iMac for internet sharing via airport

Question

Thanks in advance for any help.
I have given up trying to get an answer to my Airport problem and NTL Virgin.
I now have my iMac connected to web via ethernet all okay for a week now so it can't be my connection that was the problem.
I need to connect my PowerBook to the internet now at the same time. I would obviously like to do this using wireless technology. I was hoping to web share my iMacs connection via the airport cards on both macs but seem to be struggling.
I can set up a new network on the iMac and get the PowerBook to see it but it won't connect to the internet.
Any advice would be great thanks

Answer 1

To setup for Internet Sharing (Wired to Wireless):
Setup the Network
Internet Modem > (Ethernet cable) > \[Ethernet port] iMac > (wireless) > PowerBook
Enable Software Firewall - iMac
System Preferences > Security > Firewall
o Block all incoming connections (enabled)
Enable Internet Sharing - iMac
System Preferences > Sharing
o Select "Internet Sharing" from the options in the left column
o Share your connection from: Built-in Ethernet
o To computers using: AirPort (checked) (Note: Uncheck all other entries in the list.)
AirPort Options...
o Network Name: <anything you want>
o Channel: Automatic
o Enable encryption (using WEP) (optional)
o Password: (optional)
o Confirm Password: (optional)
o WEP Key Length: (optional)
o Click OK
o Select "Internet Sharing" again
o Click "Start" to start Internet Sharing
o Click Start